Refrigerating apparatus



Nov. 25, 193.0, 1 o. c. OLSEN 1,782,628 REFRIGERATING APPARATUS V Filedzso, 1927 s Sheets- Sheet 1 I fittomu,

NOV. 25," 1930. r v c EN v 1,782,628 REFRIGERATING APPARATUS Filed Aug.30, 1927 s Shuts-Sheet 2 Nov. 25, 1930. o. c. OLSEN REFRIGERATINGAPPARATUS Filed Aug. 30, 1927 s shaw -sheet a attouuqs Patented Nov.25,1930

" PATEN 3 OFFICE our. 6. oLsmr, or DAYTON, OHIO, .AssIe voR or rwo-rnmns'ro rnnynounim coir- IPANY, or WARREN, OHIO,

n CORPORATION or 01110 nnrnxennarme APPARATUS Application fl ed Augustso, 1927. Serial1l'o.216,392,

' This invention relates to improvements in refrigerating systems, andparticularly to that part of a system which is designed to whereby itbecomes accessible Whenever the .freezing compartment is madeaccessible,

be placed within the refrigerator and which Is referred to hereinafterasthe refrigerating unit.

One of the objects of the invention is the provision of a refri eratingunit having a control mechanism W ich shall be readily accessible. n v

'Another' object of the inventionis the location of the controlmechanism upon a removsaid end the front end of the freezingcompartment,

as by the opening of a door of the refrigerator.

/ anism, 7 after.

eraliy designated 16. From the latter liquid refr gerant under lowpressure flows through a coil of pipe 17, constituting the evaporatingc'oil within which are arranged the'freezing trays 18, while the gasgiven off by evaporation fiows from the opposite end of the coil 17 intothe flOflUChtlIllbBI of the control mechas will more clearly 'appearherein- The upper portions of the various loops of the coil 17 areclamped in position by a rod or bar 19 inthe upper edge or edges ofwhich are formed notches 20'to receive, the

pipe loops, together with a rod or bar 21 having curved extremities, thetwo bars 19 and 21 being secured together and clamped upon the loops ofthe coil 17 by means ofmachine screws 22: The bar 21 is of some littlewidth Other objects, and objects relating to de- 'and supports upon itsupper surface legs 23,

tails of construction, will appear as I proceed with the description ofthat embodiment of the invention which, for the purposes of the presentapplication, I have illustrated in the accompanying drawings, in which:i v l V .Figure 1-is a front elevational View of a refrigerating unitembodying my control mechanism. a

Figure 2 is a side elevational view of the same. a e a 5 Figure 3 is across sectional view on a larger scale of the cover plate of the floatchamber and certain associated parts, the

view being taken substantially on the line 3-3 'of Figure 1.

Figure 41, is a detail vertical sectional view a of one of theconnectors for the system, and

Figure 5 is a diagrammatic illustrationof a refrigeratingsystemembodying my invention. a

Similar'reference characters refer to like" parts throughout the views;

n it and to deliver it through pipe 12 into a con- Referring first toFigure 5 of the drawings,

the refrigerating system there shownembodies a compressor pump 10 adated-'to receive expanded gas through pipe 1 ,,to compress densin'g coil13. .The lower end of condensing coil 13 empties into a liquid receiver14, from p which apipe 15c'ontaining a'hand valve 15" leads back to.;..the control mechanism, genscrews 24.

which are secured to the bar by fiat headed plate 28 is provide thereforand removably secured thereto by stud bolts29 whichpass intothreaded-holes i-n bosses 30 on the casing. The closure plate 28 carriesall of the control mechanism. a

Somewhat below its center the cover plate 28 is provided withsathreaded'opening 31 for the reception of a connector plug 32 at theupper end of the pipe 15' leading from the condenser'coil 13. The plug32 is provided centrally with a constricted passage '33 controlled by aneedle valve 1 34: also mounted'in the plug and urged away from its seatin the passage 33 by a coil sprifig 35, bearing on the head of the valvewhich is of a size to fit a flanged ca '34'" that is slidv able in aguide hole 36 of t 'e' plate 28. The guide hole 36 extends through theplate into a cavity 37 formed in the rear side thereof. The clearancebetween-the head of the valve 34 andthe-wall of the guide opening-36af-; fords some connection between, the cavity 37 and the valve, but Iprefer to'provide-"a m brackets the bell crank 54 is formed like a bailand is further unobstructed passage 38. The head .of the valve ispressed by-the spring 35 against a diaphragm 39, which forms the rearwall of the cavity 37, being clamped at its periphery against an annularshoulder 40 by a rib 42 on a circular plate 41 of considerably smallerdiameter than the plate 28 and secured thereto by suitable means, as bya screws 43. The diaphragm 39 is movable outwardly by aRstemj44,provided with a large head 45,

and at its 'rear end with a bifurcation 46 which straddles a pin 47mounted in a bifurcated lever 48 which is xiivoted at 49 in brackets50on the plate 41. he up r end of the lever 48 is pivotally connects at 51with a short link 52 which is in turn ivoted at 53 to the short arm of abell crank ever 54 mounted at 55 on a pivot carried by a second pair of56 on the'plate 41. The rear end of attached to a metal float 57.

Leading from the cavity 37 there is a passage 58 extending into asocket59 in the forward side of the plate 28. The socket 59registerswith a short transverse passage 60 in a special connector member'61which I find it desirable to employ, although a simpler connector wouldserve the purpose.

The connector 61 has a pair of integral at taching lugs 62 through whichsecuring studs 63 extend into threaded openings 64. The passage 60connectswith a cavity'65 and thence an axial passage :66 with the intakeend of the coil of p e17. The up er end of the passage 66 is adaptedtobe c osed by a valve piece 67, onthe end ofa valve stem 68 which isthreaded for upand down adjust? ment in the connector member, .thesmooth 0 portion of the stem running through a packing 69 which is heldin place by a gland 70. The upper end of the stem 68 1s squared, asshown at 71, for the receptionof an operatmg wrench. When,the valvepiece 67 is threaded upwardly to the limit of its move- "Opera tio n e0When the apparatusis assembled and it is desired to introducerefrigerant, the plug 76 in the special connector 61 is removed and aconnection made between the refrigerant supply apparatus and thethreaded socket 75'. Charging of the apparatus then frigerant in theproceeds, and when it is completed the valve stem 68 is threadedupwardly until the passage 72 is closedby the valve piece 67, when theconnection from the refrigerant supply may be broken and the plug 76replace Now with the valve piece 67 in its upper position free flow ofrefrigerant is permitted from passa e 60 to passage 66, and thence tocoil 17. en in the course of the operation -of the apparatus it becomesnecessary to replenish the sup ly of refrigerant, the .same proceduremaybe followed, except that the valve 67 must be caused to close thepassage 72 before the plug 76 is removed.

- Gaseous refrigerant is condensed in the coil 13, due to ressureexerted by the compressor 10, an flows as liquid under heavy pressure upto the constructed passage 33 in plug 32. Assumin that the valve 34 isnot tightly seated at the time, liquid moves in small quantities pastthe valve into the cavity 37' and through passage 58 and socket 59 intopassage 60 ofthe connector 61 and thence through cavity 65 and passage66 into coil 17.. After passing the expansion valve 34 the duced. ilecirculating throu h the coil 17, more or less of "the liquid re igerant-is converted into a and this gas flows. into the float chamber in'casing 25-throu h connector 27, after which f it is drawn 0 'throughconnector' 78 and pipe 11 back to the compressor 10. When the level .inthe float chamberis suflicientIy -high,'the float 57 tilts the bellcrank 54 on its pivot 55, actuating link 52 and lever 48 to causepin 47to move the stem to the left, as viewed in Fi re 2, and to move'valve 34to closed fpositionthrough the intermediac of diaph agm. 39; When theliquid leve descends,v us to evaporation, the'stem 44 is retractedsomewhat and the sprin 35 then acts to move the valve 34 to the right'slightly and the flow of liquid into coil 17 is resumed and continueduntil the float 57 again rises sufiiciently to close the expansionressure of the liquid is much re-.

s, thus absorbing heat;

valve 34. The coil 17 is, therefore, flooded at all times.

The refrigerating unit of this apparatus is so designed that all of theworking parts are located upon the .plate 28, and this is positioned inthe front of the unit so that repairs or replacements may be made with aminimum oflabor and expense. The expansion valve, which is perhapstheelement requiring the greatest amount of servicing ma .be removed,inspected and repaired wit out the removal 0 the plate 28. When this isto be done the hand valve 15' is closed and the stem 68 is screwed downuntil the valve piece 67 closes the passage .66. The

pipe 15 may thenbe disconnected from plug 32 and the latter unscrewedand removed a with the loss of but a small part of the re-. system. v

7 mg, sald closure having an opening therei the casing sai casing, anexpansion valve or controlling the intake end of said evaporator mount-Having thus described myinvention what I claim as new is: v

1. In a refrigerating system, an evapora tor, control mechanismcomprising a casing open atone end, said casing havmg a connection withthe delivery end only of said eva orator, a closure for the 0 en end ofed outside of said casing, afloat in said casthrough, a diaphragmsealing said opening, and operative connections between said float anddiaphragm within the casing and between said dlaphragm and valve outsideof for controlling the operation. of said valve.

2. In a refrigerating system, an evaporator, afreezing compartmentwithin said evaporator accessible from the front end thereof,controlling mechanism mounted outside of said evaporator near the frontend thereof and directly mechanism 'compris ng-a casing open at itsfront end, said casing havin a connection with the delivery end only 0said evaporator, a closure for said casing, an expansion valve adaptedto admit refrigerant to the intake end of said evaporator, a float insaid casing, said closure having an openin therethrough, a' diaphragmsealing sai opening, and operative connections between said float anddiaphra within the casing and between said diap ragm and valve outsideof the casing for controlling the operation of said valve. I

3. In a refrigerating system, embodying means for circulating refrierant, acasing comprising a float chamber or the reception ofrefrigerant, a float in .said chamber, a closure for one end of saidchamber, a diaphragm in said closure, an expansion valve mounted uponsaid closure outside of said diaphra and operative connections mountevalve from said float through the intermediacy of said dia hragm.

liereof, I hereunto afiix my In testimony w signature.

. OLAF C. OLSEN.

adjacent thereto, said on said closure for actuating said

